681346 has 8 divisors (see below), whose sum is σ = 1032444. Its totient is φ = 337200.

The previous prime is 681341. The next prime is 681361. The reversal of 681346 is 643186.

It can be written as a sum of positive squares in 2 ways, for example, as 442225 + 239121 = 665^2 + 489^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (681341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1485 + ... + 1888.

681346 is a Friedman number, since it can be written as 46^3*(8-1)-6, using all its digits and the basic arithmetic operations.

2⁶⁸¹³⁴⁶ is an apocalyptic number.

681346 is a deficient number, since it is larger than the sum of its proper divisors (351098).

681346 is a wasteful number, since it uses less digits than its factorization.

681346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3476.

The product of its digits is 3456, while the sum is 28.

The square root of 681346 is about 825.4368540355. The cubic root of 681346 is about 87.9945761120.

It can be divided in two parts, 68134 and 6, that multiplied together give a palindrome (408804).

The spelling of 681346 in words is "six hundred eighty-one thousand, three hundred forty-six".